Variable-speed gearing.



*No.'877,765. PATENTED JAN. 23, 1908. .P. D. GREEN. VARIABLE sP'BBD -EARING,

APPLICATION FILED JULY'31, 1906.

2 SHEETS -BHBET 1.

2/9176 cos/a0 I r atto'pau PATENTED JAN-.28, 1908. P. 1). GREEN. VARIABLE SPEED GEARING.

APPLICATION PELED JULY 31, 1906.

2 $HEETS-SHEET 2.

1m lllllllllllllmi i mll um I mumuu mum nu n n n u miihh WNW mam rrED STA FATENT OFFICE.

FREDERICK D. GREEN, OF. FLORENCE,

VARIABLE-SEEED Zt o. erases.

Specification of Letters iiatent.

I Yatented Jan.'28,-1908. i

Application filad July 31.1906. SeriailloHiZBfiOii. I

To all whom 'it'may concern:

1e county of Lauderdale and useful variable speed Gearing, of which the whereby a driven member can be driven at 1 t.

following. is a specification This invention relates to mechanism,

varying ratesof'speed, and the direction of its movement reversed.

The pri-ncipal object is to provide novel means of alsimple nature that can be ein- .ployed in various machines and mechanisms,

and is. so constructed that the reverse operatrons of'a (l.I:lVC 11.Il1QIIll)BT can be readily con- I ,trolled, while-the speed thereof in either direction. is easily alterable from the slowest to the highest rates and vice versa, withoutimparting shocks or jars to the mechanism.

The preferred, but not the only embodimerit of the invention is illustrated inthe accompanying drawings, wherein:-

Figure 1 is a top plan view of the structure, certain portions thereof being shown in section. Fig.2 is asectional view on the line 2-2 of Fig. 1. i Fig. 3 is a sectional view on the line 3-3 of Fig. 1.

Similar reference numerals designate corresponding ,parts in all the figures of the drawings. I

in the-embodiment illustrated, a suitable frame 4 is employed, on which is journaled a diving shaft 5, and a driven shaft- 6. The driving shaft 5 has secured thereto relatively fixed, inwardly tapering cone elements 7. The driven shaft 6 has outwardly tapered cone elements 8 loosely journaled thereon,

these cone elements being relatively re- The adja-- cent portions-of the cone surfaces of the re-'- tatable in opposite directions.

spect1ve elements 7 and -8 are disposed in substantially parallel relation. The cone elements 8 are preferably provided with outer thrust bearings, consisting of abutment collars 9, one of which is' fixed to the 3 posed between them. 4

borne against by a coiled spring 13, mounted shaft, the other beingslidable thereupon.

"' i10th'e1' collars 10 are carried by the hub 11 of 'the coneS, and are disposed in opposing relation to the collars 9, balls 1 2 being inter- T he sliding collar 9 is on the driven shaft 6, and having its outer end ahutted against a suitable tension collar 14,

Secured to the driven shaft 6, between the cones a carrier 15, and onthe same are journaled planetary friction gears 16,. that are beveled as ..shown.in-Fig..1, andhave their diametrically opposite portions in frictional engagement with the opposing surfaces 17 of webs 18, constituting connections between: the cones 8 and the hubs 11, the proper frictional enga ement being insured by the spring. 13 ,as' will be evident.

dournaled between. the-sets of cones is a controlling shaft. 19 that may be rotatedby any suitable means, and is provided :with

pi'nions 20, located on opposite sides oi -the.

plane inwhich the axes of rotationof the shafts 5 and 6 are disposed. oppositely dis-. posed racks 21 are in engagement with the pinions 20,. and have their outerv ends connected by cross bars 22 that pass :between the opposing faces of the cones 7 and 8. 1 On-one of the cross bars are j'ournaled friction gears 23 that have their opposite ortions engaging the cone surfaces .ofthe e ements 7 and ;8. @ne of the gears 23 is slidable longitudinally of' the bar 22, carryingit, and is. urged towards the other by a spring 24, located in. a slot 25 in which the journal of the gear is slidably engaged. A tensioning screw 26, threaded into one-end of the cross bar, en-. gages the rear end-of the spring, and constitutes an abutment therefor. .On the other cross bar 22, are journaled sets of. friction wheels 27, the wheels of each set being in frictional engagement with each other and having their outer portions respectivelyin engagement with the cone surfaces of the other set of cones.

The operation-of the mechanism may be briefly outlined as follows. If power. is applied to the driving shaft 5 in any suitable manner, as for instance, through the medium of a pulley p28, vitwillbe evident that the cones 7 will be rotated. If now, the controllin shaft 19is turned so that the wheels 23 an 27 are positioned centrally ofthe cones 7 and 8, it will be evident-that the co'nes' l will; be rotated at: the same speed,

but in opposite directions, theplanetary now, the controlling shaft 19- is turned, so 1 that the racks 21 will be moved to carry the sin le friction gears 23 towards the smalleron of their cone 8, and; the doublegears27 towards the larger end of the other cone 8,

it will be evident that the speed of one cone...

be increased while that of the other will be reduced; This difference in'rotation will effect not only the rotation of the planet 16,

"but'the revolution around the shaft 6, and

consequently said shaft will be revolved. The nearer the frictiongears approach'the ends of the cones, the more rapid will be the speed of the driven member, and in like -manner,'the closer the gears approach the center of the cones, the slower will be the s eed of the driving member. To reverse edirection of rotation ofthe driven shaft 6, it'is only necessary to turn the controlling shaft 19 so that'the'single friction gears 23 will be carried towards the lar er end .of their driven cone 8, and the dou le friction gears 27 correspondingly carried towards the smaller end of their driven cone.- Then inasmuch'as, the speed of the cone8 engaged by the gears 23 will be reduced, and the s eed of the other cone 8 will be increased,

t e planetary gearing lfi will be caused to revo ve-in an opposite direction, It will be evident that'thisstruoture is very simple,

and .that the driven member may be slowly ibi'joughtto a standstill, or slowly thrown into i I operation in either direction without regard to the speed-of the driving member. Also that thespeed of said driven member in vantages of the herein descrlbed invention,

I "From the foregoing, it is thought that the construction, operation, and many ad- 'willbe apparent to those skilled in the art,

without further description, and it willbe I understood that/various changes the size,

shape, proportion, and minor details of con- I 'struction may be resortedfto without depart- -ing', from the spirit or sacrificing any of the {advantages of the invention.-

-' Having thus fully described my invention, ;what I claim as new, and desire to secure by Letters Patent, is: a

1. In gearing of the character described,

ated with both elements, op)

the combination witha single driven shaft; of opposite cone elements loosely journaled thereon, a planetary gear'figred to the'shaft and interposed between the cone elements,

- said gear being engaged therewith, means for yieldingly urging-one of the cone elements 3 toward the other'to insure suchengagement,

andmeans operating agamst the cone elements for rotating them at different ratesofspeed.

2. In caring of the character described, the com ination withrelatively rotatable coneI elements, of planetary gearing assoc osit'ely-rotating gears engaging andadjusta e along the cone surfaces of'the elements to eifecttheirrelative" rotation at differ e'nt speeds. I

' 3"."Ingearing of the character-described,

the combination with relatively rotatable cone elements, of planetary gearing associated with both elements, friction gears adjustablealong the cone surfaces of the ele ments to efl'ect their relative rotation at differentspeeds, and means for rotating the gears and thereby the elements in opposite directions.

4. In gearingof the character described, the combination with rotatable oppositely disposedcone elements arranged end to end, of a revoluble planetary gear located between and having a rotatable engagement with the adjacent ends of the elements, and friction I gears adjustable in opposite directions along 3 the cone surfaces of the elements toeii'ect their relative rotation. I

5. In gearing of the character described, the combination with a driven shaft, of a carrier fixed to the shaft,'oppo'sitely disposed cone elements loosely journaled on the shaft on opposite sides of the carrier, a planetarygear journaledlon the carrier and engaging the adjacent ends of the cone elements, friction gears enga ing the cone surfaces of the elements, and adjustable longitudinally along the same, and means for effecting the adjustment of the friction gears.

6. In earing of the character described, the combination with rotatable oppositely disposed driven cone elements, arranged end to end, of a revoluble planetary gear located between them and having a rotatable engagement with the adjacent ends thereof, a jd'riving member comprising oppositely disposed. cone elements, and friction gearing interposed between the corresponding driving and driven cone elements. 1 I

7 In gearing of the character described, the combination with rotatable oppositely disposed driven cone elements, arranged end to' end, of a revoluble planetary gear located between them and having a rotatable engagement with the adjacent ends thereof, a driving member comprising oppositely disposed cone elements, a controlling shaft having pin-. ions, racks engaged with the pinions, and movable longitudinally of the cone surfaces of the elements, and friction gears secured tov the said racks and operating against the adj'acent friction surfaces of the opposed elements.

8. In earing of the character described, the com ination with relatively rotatable driven cone elements, of relatively fixed driv- 12o ing cone elements disposed in opposing relation to the driven cone elements, gearing interposed between one of the driving cone elements and the o posed driven cone element for rotating the atter in one direction, a nd gearin interposed between the other dIlVlDg cone eement and the 0 posed driven cone element, for rotating the atter in an opposite direction.

Ingearing of the character described,

therombination with a gear, of' loppositely disposed, oppositely rotatable driven, cone elements, a pair of relatively fixed, oppositely disposed driving cone elements, the surfaces oi; the driving cone elements being disposed mibstantiallyarallel to the surfaces of the driven cone e enients, gearing engaging the parallel surfaces and adjustable longitudi- 10. In gearing of the character described,

the combination with a driven shaft, of outwardly tapered. cones loosely journaled on the driven shaft, a carrierfixed to the driven shatt between the cones, planetary gearing journal'e'd upon the'carrier' and engaging the adjacent end ortions of said cones, a driving shaft, inward ytapering cones fixed to the driving shaft, gear wheels interposed between the inwardly tapering and outwardly taper ing cones and engaging the same, and means jior effecting the n ovement of the gear wheels towards and from each other.-

1 1. In gearing of the character described, the combination with a driven shaft, of a carrier fixed thereto, outwardly tapered cones loosely journa'led on the shaft on opposite sides of the carrier, friction gears journaled on the carrier and engaging the adjacent ends of the cones, means for yieldingly urging the cones towards each other, a driving shaft, in-

wardly tapered cones fixed lto the driving shaft and having'portions of their cone surfaces substantially parallel to the adjacent portions of the outwardly tapered cones, a

controlling shaftlocated between the cones and having pnnons, racks engaged with said pinions, a friction gear wheel connected to one rack and'having. its opposite portions engaging the opposed-surfaces of one outwardly tapered'and one inwardly tapered cone, and a pair of friction wheels carried by the other rack and in frictional engagement, the outer sides of said friction wheels being engaged In testimony, that I claim the foregoing as .my own, I have hereto afiixed my signature in the presence of two witnesses.

FREDERICK D. GREEN Witnesses:

- E. E. ELDER, O; S. Jonnnn.

with the other outwardly tapered and in .wardly tapered cones.- 

